Explanation:
The hire purchase price of a refrigerator is $6509.A deposit of $500 is made and the reminder is paid in equal monthly payments of $250. Calculate the number of monthly payments that must be made.
amount paid over x months: 
$6509 - $500 = $6,009 
Equal payments of $250: 
$6,009 / $250 = 24.036 months of payments 
[Depending on if they want the answer rounded up, answer may become 25]